Docserver: Don't require that the appengine dev server does a cron run.

R=jyasskin@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/65523002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234191 0039d316-1c4b-4281-b951-d872f2087c98
file_manager: Add "volumeId" to VolumeMetadata in fileBrowserPrivate

This is in preparation for replacing "mount points" (paths like /Downloads)
with per-volume FileSystem objects.

BUG=316077
TEST=none

Review URL: https://codereview.chromium.org/66303002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234192 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 234192